IP Library › Granted Patent US 11,531,192
Granted Patent B2
US 11,531,192 · App. 17/074,895 · Granted Dec 20, 2022

Optical imaging system

Inventors: Hag Chul Kim (Suwon-si, KR); Yong Joo Jo (Suwon-si, KR); Hwan Soo Park (Suwon-si, KR)
Assignee: Samsung Electro-Mechanics Co., Ltd.
G02B13/0045G02B1/007G02B1/041
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Quick Facts
Patent No.
US 11,531,192
App. No.
17/074,895
Granted
Dec 20, 2022
Kind
B2
Abstract

An optical imaging system includes a first lens having negative refractive power, a second lens having negative refractive power, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first to seventh lenses are sequentially disposed from an object side toward an image side. The third lens, the fourth lens, the sixth lens, and the seventh lens are formed of plastic, and the first lens, the second lens, and the fifth lens are formed of glass.

Claims (50)

1. An optical imaging system comprising:

a first lens comprising negative refractive power;

a second lens comprising refractive power;

a third lens comprising positive refractive power;

a fourth lens comprising negative refractive power;

a fifth lens comprising refractive power;

a sixth lens comprising positive refractive power; and

a seventh lens comprising negative refractive power,

wherein the first to seventh lenses are sequentially disposed from an object side toward an image side,

wherein TTL/(2*IMGH)<3.0 is satisfied, where TTL is a distance from an object-side surface of the first lens to an imaging plane of an image sensor, and IMGH is a half of a diagonal length of the imaging plane of the image sensor, and

wherein −0.5<f/f4<−0.1 is satisfied, where f4 is a focal length of the fourth lens, and f is an overall focal length of the optical imaging system.

2. The optical imaging system of claim 1 , wherein the second lens comprises a concave image-side surface.

3. The optical imaging system of claim 1 , wherein the third lens comprises a convex object-side surface and a convex image-side surface.

4. The optical imaging system of claim 1 , wherein the fourth lens comprises a concave object-side surface.

5. The optical imaging system of claim 1 , wherein the fifth lens comprises a convex image-side surface.

6. The optical imaging system of claim 1 , wherein the sixth lens comprises a convex object-side surface and a convex image-side surface.

7. The optical imaging system of claim 1 , wherein n3<1.64 is satisfied, where n3 is a refractive index of the third lens.

8. The optical imaging system of claim 1 , wherein n7<1.64 is satisfied, where n7 is a refractive index of the seventh lens.

9. The optical imaging system of claim 1 , wherein n7<1.64 is satisfied, where n7 is a refractive index of the seventh lens.

10. An optical imaging system comprising:

a first lens comprising negative refractive power;

a second lens comprising refractive power;

a third lens comprising positive refractive power;

a fourth lens comprising negative refractive power;

a fifth lens comprising refractive power;

a sixth lens comprising positive refractive power; and

a seventh lens comprising negative refractive power,

wherein the first to seventh lenses are sequentially disposed from an object side toward an image side,

wherein −0.5<f/f4<−0.1 is satisfied, where f4 is a focal length of the fourth lens, and f is an overall focal length of the optical imaging system, and

wherein n3<1.64 is satisfied, where n3 is a refractive index of the third lens.

11. The optical imaging system of claim 10 , wherein the second lens comprises a concave image-side surface.

12. The optical imaging system of claim 10 , wherein the third lens comprises a convex object-side surface and a convex image-side surface.

13. The optical imaging system of claim 10 , wherein the fourth lens comprises a concave object-side surface.

14. The optical imaging system of claim 10 , wherein the fifth lens comprises a convex image-side surface.

15. The optical imaging system of claim 10 , wherein the sixth lens comprises a convex object-side surface and a convex image-side surface.

16. An optical imaging system comprising:

a first lens comprising negative refractive power;

a second lens comprising refractive power;

a third lens comprising positive refractive power;

a fourth lens comprising negative refractive power;

a fifth lens comprising refractive power and a convex image-side surface;

a sixth lens comprising positive refractive power; and

a seventh lens comprising negative refractive power,

wherein the first to seventh lenses are sequentially disposed from an object side toward an image side,

wherein TTL/(2*IMGH)<3.0 is satisfied, where TTL is a distance from an object-side surface of the first lens to an imaging plane of an image sensor, and IMGH is a half of a diagonal length of the imaging plane of the image sensor, and

wherein n3<1.64 is satisfied, where n3 is a refractive index of the third lens.

17. The optical imaging system of claim 16 , wherein the second lens comprises a concave image-side surface.

18. The optical imaging system of claim 16 , wherein the third lens comprises a convex object-side surface and a convex image-side surface.

19. The optical imaging system of claim 16 , wherein the fourth lens comprises a concave object-side surface.

20. The optical imaging system of claim 16 , wherein the sixth lens comprises a convex object-side surface and a convex image-side surface.

Priority Claims (1)
KR 10-2017-0167715 · Dec 7, 2017 · national
Continuity (2)
Continuation 16108506 · Aug 22, 2018
Related Publication 20210033827A1 · Feb 4, 2021